/*
 * Copyright 2010 Michael Nitsche
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.mnit.basis.daten.typ.zeit;

import de.mnit.basis.daten.S_Vergleichbar;


/**
 * @author Nitsche Michael
 *
 * Gültige Jahre: 1600-2999
 * Notiz: die erste Woche im Jahr mit einem Donnerstag ist die 1.KW
 */
public interface S_Datum extends S_Vergleichbar<S_Datum> {

	int gTag();
	int gMonat();
	int gJahr();

	int diffTage(S_Datum d);
	int diffMonate(S_Datum d);
	int diffJahre(S_Datum d);

	S_Datum gPlusTage(int anzahl);
	S_Datum gPlusMonate(int anzahl);
	S_Datum gPlusJahre(int anzahl);

	String zuTextEDV();
	String zuText(Object... format);

}
